Combined insulator and fuse-box.



PATENTED JUNE 7, 1904.

' I A. BEARSB.

COMBINED INSULATOR AND FUSE BOX.

APPLICATION FILED AUG. 26, 1903.

N0 MODEL.

its. 761,814.

UNITED STATES Patented June '7, 1904.

PATENT OFFICE.

COMBINED INSULATOR AND FUSE-BOX.

SPECIFICATION forming part of Letters Patent No. 761,814, dated-June '7, 1904.

Applicationfiled August 26, 1903. .Serial No. 170,811. (No model.)

To all whom, it may cowl/earn..-

Beit known that I, AARON BEARSE, of Syracuse, in the county of Onondaga, in the'State of New York, have invented new and useful Improvements in a Combined Insulator and Fuse-Box, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact-description.

This invention relates to a combined insulator and fuse-box which is adapted to be secured in the usual manner to the pins of a cross-arm or other support.

The object of my present invention 'isto utilize the insulator to which the electric wire is secured for the purpose of receiving the fuse or the lightning-arrester, or both fuse and lightning-arrester, as may be desired.

Another object is to provide this insulator with a removable cap in which the fuse is located and is adapted to be removed with the cap, so that the burned fuse may be readily removed and a new one inserted without liability of accident or shock to the lineman.

Other objects will appear in'the subsequent description. 4 c

In the drawings, Figure 1 is a transverse vertical sectional view through an insulator embodying the features of my-invention andshowing the transverse partition projecting upwardly through the recess in the top of the base.

Similar reference characters indicate corresponding parts in all the views.

An insulator-pin 1 is shown as mounted upon the cross-arm 2 and projects upwardly therefrom, the upper end being threaded at 3. An insulator-base 4 is provided with a threaded socket 5 to receive the threaded portion 3 of the pin 1, so that the base may be screwed on and off from the pin at will, said threaded socket extending upwardly from the lower face of the insulator, but terminates below the upper end so that it leaves a solid insulating body or wall above the socket. The upper end of this insulator-base is formed with a central recess 6, which extends inwardly from its outer end, but terminates short of the socket 5 to form a partition-wall 7 between the socket 5 and recess 6. A cap 8, of insulating material,is detachably secured to the outer end of the base 4 for closing the open end of the recess 6, said cap beingjalso formed with a central recess 9 in its inner face alined with the recess 6 and forming a continuation thereof. The outer end of the base is formed with an annular flange 10, having diametrically opposite cut-outs 11, and the inner end of the cap 8 is formed with an annular flangelQ, having inwardly-projecting lugs 13 of substantially the same or slightly less width than the cut-outs 11, so that in placing the cap in position the lugs 13 are alined with the cutouts 11 and extend below the flange 10, and by turning the cap a quarter-turn the lugs 13 .are interlocked with the diametrically opposite parts of the flange and serve to hold the cap in operative position upon the base.

A fuse-wire 14 is inserted in the recess 9 of the cap 8 and is provided with diametrically opposite terminals 15, which project beyond the opposite walls of the recess 6 and underlie adjacent portions of the cap, so that whenthe cap is secured in position these terminals are impinged between the cap and outer end of the base-section. This fuse-wire is removable with the cap, and the terminals 15 are fitted into recesses 16 in the inner face of the cap, which serves to hold the wire from circumferential movement relative to the cap when the latter is being placed upon the base, and

the terminals 15 are in substantially the same A lightning-arrester 19 is mounted in the base of the recess 6 and is preferably attached in any desired manner to the outer face of the projection 7, one terminal of the lightningarrester being connected to the terminal 1'7 by a wire 20 and is also connected to the main line 21 by a wire 22, which in this instance forms a continuation of the line-wire 21, the latter being dead-ended or wound around the insulator-base 4, which is formed with a groove 23 for receiving this winding. This end 22 of the wire is then passed upwardly through a lengthwise opening 24: in the base which extends from its lower face to the recess 6 at one side of the socket 5, the end of the wire 22 being attached to a suitable binding-post upon the terminal of the lightning arrester, which is connected to the terminal 17. The other terminal, 18, is connected to a wire 25, which is passed through an opening 26, extending from the recess 6 through the lower face of the base, and this line 25 may be connected to any outside transformer or directly to the work which is being done. The second terminal of the lightning-arrester is connected to the wire 27, which is passed through a third aperture 28 in the base simi lar to the apertures 24 and 26 and may be grounded at 29 in the usual manner. The terminals 17 and 18 are located substantially midway between the cut-outs 11, and it therefore becomes apparent that when the cap is placed in position with the lugs 13 registered with the cut-outs 11 the terminals 15 and fuse 14 are out of the circuit; but just as soon as the cap is rotated to interlock the lugs with the flange 10 the terminals 15 are brought into contact with their respective terminals 17 and 18, thus closing the circuit through the fuse.

In order to prevent any arcing or jumping of the current between the terminals 17 and 18, I provide the base with an u )wardly-pro jecting partition 30, which extends lengthwise through the recess 6 and into close proximity to the fuse 5), so that the liability of arcing is reduced to a minimum, thereby avoiding a burning out of the metallic parts.

It is now evident that the same insulator to which the wire is secured serves also as a receptacle for the fuse and lightning-arrester and that the lineman may safely remove the cap to repair the fuse without liability of shock.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. An insulator-base having a removable cap, one of the parts having a recess intervening between the base and cap, and a fuse in the recess.

2. An insulator and support therefor having a .reeess in its outer end, a removable cap closing the recess, a lightning-arrester in the recess, and a fuse in the cap.

3. An insulator comprising a base having a socket, in one end to receive a support and having a recess in its other end, a lightningarrester in the recess, a removable cap for the recess to conceal the arrester, and a fuse in the cap.

L. An insulator-base having a recess and apertures leading from the recess to the exterior of the base, a cap for the recess, terminals of an electric circuit in the recess having wires passing out through the apertures, and a fuse in the cap connecting said terminals and removable with the cap.

5. In combination, a pin, a base of insulat: ing material fitted on the pin. a fuse, and a cap fitted on the base and receiving and concealing the fuse.

6. An insulator comprising a base and removable cap therefor, terminals of an electric circuit between the base and cap, and a partition of insulating material on the base and projecting between the terminals to prevent arcing of the current, and a fuse between the base and cap and connecting the terminals.

7. An insulator-base having a socket in one end to receive a supporting-pin and formed with a recess in its other end and with apertures leading from the recess through the base, terminals of an electric circuit on the recess end of the base, wires leading from the terminals through the apertures, one of the wires being dead-ended on the base, a cap closing the recess and removably secured to the base, and a fuse in the cap connecting the terminals and removable with the cap.

8. The combination with an insulator-base and a removable cap therefor, said base having openings leading from the space between the base and cap to the exterior of the base, terminals on the electric circuit between the base and cap, a wire of said circuit deadended on the insulator, and additional wires leading from the terminals through the openings, one of the additional wires being electrically connected to the first-named wire outside of the insulator.

In witness whereof I have hereunto set my hand this 24th day of August, 1003.

AARON B EA RS1 1.

\Vitnesses:

H. E. Gimslc, HOWARD 1. Dumsym. 

